using System; using System.Drawing; using System.Windows.Forms; class TwoPanelsWithSplitter: Form { public static void Main() { Application.Run(new TwoPanelsWithSplitter()); } public TwoPanelsWithSplitter() { Panel panel1 = new Panel(); panel1.Parent = this; panel1.Dock = DockStyle.Fill; panel1.BackColor = Color.Lime; panel1.Resize += new EventHandler(PanelOnResize); panel1.Paint += new PaintEventHandler(PanelOnPaint); Splitter split = new Splitter(); split.Parent = this; split.Dock = DockStyle.Right; Panel panel2 = new Panel(); panel2.Parent = this; panel2.Dock = DockStyle.Right; panel2.BackColor = Color.Red; panel2.Resize += new EventHandler(PanelOnResize); panel2.Paint += new PaintEventHandler(PanelOnPaint); } void PanelOnResize(object obj, EventArgs ea) { ((Panel) obj).Invalidate(); } void PanelOnPaint(object obj, PaintEventArgs pea) { Panel panel = (Panel) obj; Graphics grfx = pea.Graphics; grfx.DrawEllipse(Pens.Black, 0, 0, panel.Width - 1, panel.Height - 1); } }